Which main groups supported mussolini’s effort to overthrow the government in italy? union leaders, peasants, and businessmen soldiers, farm laborers, and factory workers army officers, wealthy landowners, and industrialists navy officers, wealthy politicians, and foreign officials,

The answer is army officers, wealthy landowners, and industrialists.
After World War I, fascism arose in Europe that many people desired for a strong leadership and unity. That was when Benito Mussolini looked for a way to unify the Italian people and formed the Fascist Party who could sort out Italy’s problems. The Fascists Party or Fascists are a gang of street fighters who wore black shirts. They beat up socialists and communists and threw them out of the government. The Fascists movement are often financed by landowners or industrialist.